NS7 to NS8 Migration issue

tried with user root in cockpit (although I never used NS7 like that):
On Email -migration:

  1. “sync-data” again clickable - but maybe the new login was also releasing that - but same error in GUI (managed now to use the copy button via zooming)
 echo '{"app":"nethserver-mail","action":"sync"}' | /usr/bin/setsid /usr/bin/sudo /usr/libexec/nethserver/api/nethserver-ns8-migration/migration/update | jq

in /var/log/messages:

May  8 11:31:01 XXXXX cockpit-bridge: /usr/sbin/ns8-check-import: line 35: bind.env: No such file or directory

Maybe this is now a hint why sync does not start?

still no entry in ns8-migration.log except the single line

----------- sync nethserver-mail Thu, 08 May 2025 11:31:01 +0200
  1. “abort migration” button
    permission denied entry in /var/log/messages indeed disappeard with using Cockpit with user root

same error though

but in ns8-migration.log now an entry - but not really helpful

----------- abort nethserver-mail Thu, 08 May 2025 11:34:13 +0200